Hampton Beach

New Hampshire Weather in September

Average temperatures, rainfall, sunshine and the best places to visit in New Hampshire, the United States of America in September.

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Portsmouth Nashua Weirs Beach Dover

Planning a journey to New Hampshire, the United States of America this September and curious over the weather conditions to await? Your essential details are found on this page, answering your query:

What to Expect in New Hampshire in September

New Hampshire, the United States of America is a region in the United States of America. September in New Hampshire generally has temperatures that range from pleasant to warm, with precipitation levels ranging from moderate to high.

Temperatures

The average highest temperatures fluctuate between pleasant in Waterville Valley at 19°C (66°F) to warm in Nashua at 24°C (75°F). Nighttime temperatures generally drop to 11°C (52°F) in Nashua and 8°C (46°F) in Waterville Valley.

To learn more about the conditions in specific areas of New Hampshire, the United States of America, check out the map below.

Precipitation

In September, precipitation varies across different areas. From moderate rainfall in West Lebanon with an average of 78 mm (3.1 in) to high rainfall in West Chesterfield with 112 mm (4.4 in).

Average sunshine

Many locations offer abundant sunshine during this month. For instance, Portsmouth enjoys approximately 214 hours of sunlight, ideal for those seeking sunny weather.

Explore New Hampshire by month

Pick a month to see the average temperature, rainfall and sunshine in New Hampshire — and find the best time to visit. (based on Portsmouth)

January1°C (34°F) February2°C (36°F) March7°C (45°F) April13°C (55°F) May19°C (66°F) June23°C (73°F) This monthJuly27°C (81°F) August26°C (79°F) September23°C (73°F) October16°C (61°F) November10°C (50°F) December5°C (41°F)
Best Time to Visit New Hampshire →

Best Places to Visit in New Hampshire in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across New Hampshire.

Conditions Temperatures Precipitation
perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in New Hampshire

What is the weather like in September for some of the most popular destinations in New Hampshire, the United States of America?

Temperature range in New Hampshire (September)

Precipitation variation in New Hampshire (September)

Portsmouth

In September Portsmouth generally has high temperatures with maximum daytime temperatures around 23°C (73°F), minimum nighttime temperatures around 12°C (54°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

« August
September
October »
August
September
October
Max temperature
26°C (79°F)
23°C (73°F)
16°C (61°F)
Min temperature
16°C (61°F)
12°C (54°F)
6°C (43°F)
Monthly sun hours
261 hours
214 hours
183 hours
Monthly rainfall
102 mm (4 in)
96 mm (3.8 in)
116 mm (4.6 in)
Monthly rainy days
10 days
9 days
13 days
Weather conditions
pleasant
perfect
unpleasant
Climate in Portsmouth →

Nashua

In September Nashua generally has high temperatures with maximum daytime temperatures around 24°C (75°F), minimum nighttime temperatures around 11°C (52°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

« August
September
October »
August
September
October
Max temperature
28°C (82°F)
24°C (75°F)
17°C (63°F)
Min temperature
16°C (61°F)
11°C (52°F)
5°C (41°F)
Monthly sun hours
261 hours
214 hours
183 hours
Monthly rainfall
100 mm (3.9 in)
89 mm (3.5 in)
125 mm (4.9 in)
Monthly rainy days
11 days
10 days
13 days
Weather conditions
pleasant
perfect
unpleasant
Climate in Nashua →

Weirs Beach

In September Weirs Beach generally has high temperatures with maximum daytime temperatures around 22°C (72°F), minimum nighttime temperatures around 11°C (52°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

« August
September
October »
August
September
October
Max temperature
26°C (79°F)
22°C (72°F)
15°C (59°F)
Min temperature
14°C (57°F)
11°C (52°F)
5°C (41°F)
Monthly sun hours
261 hours
214 hours
183 hours
Monthly rainfall
109 mm (4.3 in)
96 mm (3.8 in)
133 mm (5.2 in)
Monthly rainy days
11 days
11 days
13 days
Weather conditions
pleasant
perfect
unpleasant
Climate in Weirs Beach →

Dover

In September Dover generally has high temperatures with maximum daytime temperatures around 23°C (73°F), minimum nighttime temperatures around 10°C (50°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

« August
September
October »
August
September
October
Max temperature
27°C (81°F)
23°C (73°F)
16°C (61°F)
Min temperature
14°C (57°F)
10°C (50°F)
5°C (41°F)
Monthly sun hours
261 hours
214 hours
183 hours
Monthly rainfall
101 mm (4 in)
91 mm (3.6 in)
113 mm (4.4 in)
Monthly rainy days
11 days
10 days
12 days
Weather conditions
pleasant
perfect
unpleasant
Climate in Dover →

Tilton

In September Tilton generally has high temperatures with maximum daytime temperatures around 22°C (72°F), minimum nighttime temperatures around 10°C (50°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

« August
September
October »
August
September
October
Max temperature
26°C (79°F)
22°C (72°F)
15°C (59°F)
Min temperature
14°C (57°F)
10°C (50°F)
4°C (39°F)
Monthly sun hours
261 hours
214 hours
183 hours
Monthly rainfall
107 mm (4.2 in)
94 mm (3.7 in)
133 mm (5.2 in)
Monthly rainy days
11 days
10 days
12 days
Weather conditions
pleasant
perfect
unpleasant
Climate in Tilton →

Is your destination not in the list? Have a look at all destinations in New Hampshire, in the United States of America.

Popular cities in September

Day & night temperatures, rainfall and average weather in New Hampshire in September.

City Weather Day temp Night temp Rainfall
Portsmouth 23°C (73°F) 12°C (54°F) 96 mm (3.8 in)
Nashua 24°C (75°F) 11°C (52°F) 89 mm (3.5 in)
Weirs Beach 22°C (72°F) 11°C (52°F) 96 mm (3.8 in)
Dover 23°C (73°F) 10°C (50°F) 91 mm (3.6 in)
Tilton 22°C (72°F) 10°C (50°F) 94 mm (3.7 in)
Gilford 22°C (72°F) 11°C (52°F) 95 mm (3.7 in)

New Hampshire weather in September: frequently asked questions

What is the weather like in New Hampshire, the United States of America in September?

September in New Hampshire, the United States of America brings perfect weather. In Portsmouth, daytime temperatures are typically around 23°C (73°F) and nighttime lows hover near 12°C (54°F).

What is the average temperature in New Hampshire, the United States of America in September?

In Portsmouth, the average daytime high in September is 23°C (73°F), while nighttime temperatures drop to around 12°C (54°F).

Does New Hampshire, the United States of America get a lot of rain in September?

Not particularly. Portsmouth averages just 96 mm (3.8 in) of rain in September, making it a mostly dry month for New Hampshire, the United States of America.

Is September a Good Time to Visit New Hampshire, the United States of America?

We consider September to be one of the best times to travel to New Hampshire, the United States of America. Typically, the climate in Portsmouth is perfect. However, the weather conditions may vary depending on your destination.

On average, the best time to visit New Hampshire, the United States of America is in September with generally perfect weather in Portsmouth. On the other hand, the months of January, February, March, April, November and December tend to have poor weather conditions.

Interested in more climate information?

We have much more information about the climate in New Hampshire.

Weather and climate has detailed information for every country in the world. Are you going to the United States of America? Get detailed historical weather averages for many cities in the United States of America.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

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